Put me down as a minus one for the HSPY things. It kind of sucks. Super noisy (not sure what your application is, but for me the noise was an issue), build quality not great, it's a bitch to work on internally, and just... meh.
Also, and this is a big thing IMO, you can't trust the output toggle button to actually latch. Sometimes it does, sometimes it doesn't, meaning sometimes you disconnect something with hundreds of volts on it even though you hit the damn button to turn the output off already. I'm aware of it now, but it caught me a couple times early on.